6 Questions
What powers the Earth system according to the text?
Radioactive decay and gravitational energy
Which subsystem includes all life forms on Earth?
Biosphere
What percentage of Earth's water is fresh according to the text?
3%
In what form does much of the Earth's water exist?
Solid ice
What is a closed system based on the text?
A system with no exchange of matter but only heat or energy
Which theme emphasizes the different length and time scales of processes in the Earth system?
Scale
Test your knowledge on the Earth system and its major themes, including scale and interactions between interconnected components. Explore concepts such as closed systems, energy exchange with the sun, and different scales of processes within the Earth system.
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